Debt Avalanche Payoff Calculator
Use the debt avalanche method to find your optimal payoff order, total interest saved vs. snowball, and exact months to debt freedom. Enter up to 3 debts with their APR and minimum payment.
See step-by-step calculation
When to use this calculator
- Ranking which credit card to attack first when rates range from 18% to 29.99% APR
- Estimating how many months until you are completely debt-free with a fixed extra payment
- Comparing total interest paid under avalanche vs. snowball to pick the right strategy
- Planning cash flow after each debt is eliminated by seeing how freed-up minimums stack
- Deciding whether a balance-transfer offer actually beats the avalanche on your specific debts
- Setting a realistic payoff goal before applying for a mortgage or auto loan
Avalanche vs. Snowball: Method Comparison
| Feature | Avalanche | Snowball |
|---|---|---|
| Priority order | Highest APR first | Lowest balance first |
| Total interest paid | Lowest possible | Slightly higher |
| Payoff timeline | Nearly identical | Nearly identical |
| First debt cleared | Usually the longest to pay off | Usually the fastest to pay off |
| Best for | Minimizing total cost | Building early momentum |
| Estimated savings vs. the other (typical $20k debt) | $400–$3,000 | — |
Fuente: Consumer Financial Protection Bureau — Strategies for Paying Down Debt (2025); worked example data from calc content.
How it works
What is the Debt Avalanche Method?
The debt avalanche is a payoff strategy that prioritizes paying down debts with the highest interest rates first while making minimum payments on others. Once the highest-rate debt is eliminated, you redirect that payment to the next-highest rate. This approach minimizes total interest paid over time compared to any other fixed-payment strategy.
How the Debt Avalanche Works
The avalanche method sorts your debts from highest APR to lowest APR. Every month you pay each debt's minimum payment, then direct every extra dollar to the top-ranked (highest-rate) debt. Once that debt hits $0, its minimum payment is freed up and added to the extra payment pool — this is called "rolling" the payment. The total monthly outlay never increases.
The Core Formula
For each month t, for debt i with balance B_i, monthly rate r_i = APR_i / 12, and payment P_i:
Interest_i(t) = B_i(t) × r_i
Principal_i(t) = P_i(t) − Interest_i(t)
B_i(t+1) = max(0, B_i(t) − Principal_i(t))The total monthly payment is fixed:
Total = sum(all minimums) + extra_paymentThe target debt (highest APR with balance > 0) receives:
P_target = minimum_target + remaining_extraAll other debts receive only their minimum payment.
Avalanche vs. Snowball: Quick Reference Table
| Feature | Avalanche | Snowball |
|---|---|---|
| Priority | Highest APR first | Lowest balance first |
| Total interest | Lowest possible | Slightly higher |
| Payoff timeline | Nearly identical | Nearly identical |
| First debt cleared | Usually the longest | Usually the fastest |
| Best for | Minimizing cost | Building momentum |
| Savings vs. other | $400–$3,000 on typical $20k debt | — |
Interest Savings by Scenario
Below are estimated savings from choosing avalanche over snowball (fixed $200/month extra):
| Total Debt | APR Range | Approx. Interest Saved |
|---|---|---|
| $5,000 | 18%–25% | $80–$200 |
| $10,000 | 18%–25% | $200–$500 |
| $20,000 | 15%–28% | $500–$1,500 |
| $30,000 | 15%–28% | $800–$2,500 |
| $50,000 | 12%–24% | $1,000–$4,000 |
Savings increase with: (1) larger spread between your highest and lowest APR, and (2) larger balances on the highest-rate debts.
Worked Example
Three debts, $200 extra/month:
| Debt | Balance | APR | Minimum |
|---|---|---|---|
| Visa | $5,000 | 24.99% | $100 |
| MC | $3,000 | 19.99% | $75 |
| Student | $12,000 | 6.54% | $130 |
Total monthly payment = $100 + $75 + $130 + $200 = $505/month
Avalanche order: Visa first (24.99%) → MasterCard (19.99%) → Student loan (6.54%)
Snowball Comparison
The snowball method sorts debts lowest balance first instead. It often produces faster early wins (first debt eliminated sooner) but pays slightly more total interest because lower-balance debts do not always carry the highest rates. Both methods use the same total monthly outlay — the only difference is where the extra dollar goes.
Limitations
Frequently asked questions
Does the avalanche always save the most money?
How much does the avalanche actually save vs. the snowball?
What counts as the 'extra payment'?
Why does the snowball sometimes finish in the same number of months?
Should I include my mortgage in the avalanche?
How does a 0% balance transfer affect the avalanche?
My minimum payments change every month — how accurate is this calculator?
How is the monthly interest calculated?
What if I can't afford even the minimum payments?
Is paying off debt better than investing the extra money?
Sources & references
- Consumer Financial Protection Bureau — Strategies for Paying Down Debt — CFPB (2025)
- Federal Reserve — Consumer Credit Report (G.19) — Federal Reserve (2026)
- Regulation Z — Truth in Lending (12 CFR Part 1026) — CFPB / eCFR (2026)
- National Foundation for Credit Counseling (NFCC) — NFCC (2026)
Methodology & trust
Calculadora de finanzas revisada por el equipo editorial de Hacé Cuentas, contrastada con Consumer Financial Protection Bureau — Strategies for Paying Down Debt, según nuestra política editorial y metodología.
Última revisión: June 20, 2026. Los parámetros se verifican periódicamente con las fuentes citadas.
Calculations run 100% in your browser. We do not store or transmit your data.
Indicative results. For critical decisions, consult a professional.
Rodríguez, M. (2026). Debt Avalanche Payoff Calculator. Hacé Cuentas. https://hacecuentas.com/debt-avalanche-payoff-calculator
Contenido bajo licencia CC-BY 4.0 — reutilizable citando la fuente con enlace a Hacé Cuentas.